ubuntu-bug (apport) does not open a new tab in the browser after click “send”

[betteropensource]

I do "ubuntu-bug packageName" in the terminal, then the window appear asking to me to chose "not send" or "send".

After clicking "send" nothing happens and the window closes, without open a new tab in the browser.

I already inserted Crash in /etc/apport/crashdb.conf

The file /etc/default/apport already contains:
enabled=1

lsb_release -rd:
Description: Ubuntu 18.04.3 LTS
Release: 18.04

apt-cache policy apport:
apport:
  Installato: 2.20.9-0ubuntu7.6
  Candidato: 2.20.9-0ubuntu7.7
  Tabella versione:
     2.20.9-0ubuntu7.7 500
        500 http://it.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        500 http://it.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages
        500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu bionic-security/main i386 Packages
 *** 2.20.9-0ubuntu7.6 100
        100 /var/lib/dpkg/status
     2.20.9-0ubuntu7 500
        500 http://it.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        500 http://it.archive.ubuntu.com/ubuntu bionic/main i386 Packages

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.